Issue Hover Card fails for external repository issue reference surrounded by parentheses

[melink14]

Issue Type: Bug

Steps to Reproduce:

1. Make a TODO with issue in another repository using paren formatting:

// TODO(trygve-lie/esbuild-plugin-import-map#25): Remove when official definition is added.

2. Hover over it and confirm error message in logs:

[Info] GithubRepository> Unable to fetch PR: Error: GraphQL error: Could not resolve to a Repository with the name 'TODO(trygve-lie/esbuild-plugin-import-map'.

It works if I put spaces around the issue number but it's a bit unwieldy considering same repo refs work differently.

Extension version: 0.34.3
VS Code version: Code 1.63.2 (899d46d82c4c95423fb7e10e68eba52050e30ba3, 2021-12-15T09:40:02.816Z)
OS version: Windows_NT x64 10.0.19043
Restricted Mode: No
Remote OS version: Linux x64 5.10.60.1-microsoft-standard-WSL2

System Info

Item	Value
CPUs	AMD Ryzen 9 5950X 16-Core Processor (32 x 3400)
GPU Status	2d_canvas: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on oop_rasterization: enabled opengl: enabled_on rasterization: enabled skia_renderer: enabled_on video_decode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled
Load (avg)	undefined
Memory (System)	15.92GB (1.91GB free)
Process Argv	--crash-reporter-id 56cd355b-45cd-41ef-9aa0-32e251f0fac2
Screen Reader	no
VM	0%

Item	Value
Remote	WSL: Pengwin
OS	Linux x64 5.10.60.1-microsoft-standard-WSL2
CPUs	AMD Ryzen 9 5950X 16-Core Processor (32 x 3399)
Memory (System)	7.76GB (0.88GB free)
VM	0%

A/B Experiments

vsliv368:30146709
vsreu685:30147344
python383:30185418
vspor879:30202332
vspor708:30202333
vspor363:30204092
pythonvspyl392:30425749
pythontb:30283811
pythonptprofiler:30281270
vshan820:30294714
vstes263cf:30335440
pythondataviewer:30285071
vscod805cf:30301675
pythonvspyt200:30340761
binariesv615:30325510
bridge0708:30335490
bridge0723:30353136
vsaa593cf:30376535
vsc1dst:30424896
pythonvs932:30410667
vscop804:30404766
vscop341:30404997
vsrem710:30416614
vsbas813:30426126
vsic-wlc-tsjs:30426436

[roblourens]

Works great but I noticed the highlight is includes the opening paren but not the closing paren